A special mortar for air-entrained concrete

Abstract

The invention discloses special mortar for aerated concrete. The special mortar is prepared from the following components in parts by weight: 160 to 200 parts of cement, 100 to 140 parts of fly ash, 600 to 800 parts of medium sand, 5 to 10 of redispersible latex powder, 1 to 10 parts of starch ether, 1 to 10 parts of cellulose ether, 1 to 10 parts of polycarboxylate superplasticizer, 1 to 6 partsof fiber, 1 to 3 parts of retarder, and 1 to 2 parts of defoaming agent, wherein the mass ratio of the cement to the fly ash to the medium sand is (4-6):3:(18-20); the mass ratio of starch ether to cellulose ether to the polycarboxylate superplasticizer is (2-5):3:(3-10); the fiber is a mixture of polypropylene fiber and wood fiber in a mass ratio of 1:(2-4). The special mortar for aerated concrete has excellent performance by the selection and the weight ratio of the components, comprehensive utilization of the excellent performance of each component, and the complementation of the components. The special mortar can effectively solve the problems of cracking, leakage, floated coat hollowing and stripping of aerated concrete, and is beneficial to the popularization and use of aerated concrete.

Description

technical field [0001] The invention belongs to the technical field of building materials, and mainly relates to a special mortar for air-entrained concrete and its application method. Background technique [0002] Air-entrained concrete is a new type of building material, which has excellent functions such as heat preservation, heat insulation, sound insulation, light weight, fire prevention, machinability, impermeability, and good durability. It is an ideal combination of heat preservation and enclosure functions. The emerging green environmental protection wall material, and is currently the only single self-insulating wall that can meet the 65% energy saving rate. Therefore, air-entrained concrete blocks are widely used in load-bearing walls and self-supporting walls of various buildings. They are an ideal wall material to replace traditional solid clay bricks. Support, has broad market development prospects. [0003] Because there are many pores inside the air-entrain...

AI Technical Summary

Problems solved by technology

The dry powder mortar adjusts the dry shrinkage value of the mortar by adding cement and gypsum, making it close to the dry shrinkage value of the autoclaved aerated concrete block, so that the material of the adhesive mortar is similar to the dry shrinkage value of the autoclaved aerated concrete block , shrink and expand simultaneously to overcome the phenomenon of hollowing and dry cracking in the masonry and plastering layers caused by too fast water loss of the wall, but at the same time, the bonding performance of the mortar itself and the aerated concrete block decreases

[0005] At present, the development of special mortar for air-entrained concrete is still very imperfect, and it cannot have good water retention, good wall adhesion, and good deformation resistance.

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